| IDAK |
| Idle bids |
| Illogical bid |
| Impossible bid |
| Impossible negative |
| Improper call |
| Informatory double |
| Informatory pass |
| Inhibitory double |
| Insurance bid |
| Interest-showing bids |
| Interference bid |
| Interim response |
| Interior card |
| Interior sequence |
| Intermediate cards |
| Intermediate jump overcall |
| Intermediate two-bid |
| Intervening bid |
| Inverted minor raises |
| Invitation, invitional bid |
